Sometimes wastewater treatment doesn't involve clarifiers or even treatment buildings big enough to walk around inside. Approximately 25 percent of homes in the United States are not connected to centralized sewer systems. These homes and businesses collect and treat their wastewater on their own property using systems that are referred to as onsite wastewater treatment systems, septic systems, or decentralized systems.

In some rural and suburban areas, everyone uses decentralized systems. Even in communities with sewers and a centralized treatment facility, there are often areas the sewer does not reach and where homes or businesses are on septic systems. If a community wants to manage all of its wastewater, it is necessary to address both centralized and decentralized systems.

This video is for small, rural communities that are looking for wastewater treatment options. You'll hear about the benefits of onsite systems and get a "tour" of one community's system.

Small, on-site treatment systems are an innovative way to treat water. They come in a variety of types and are often found in housing subdivisions, schools and small commercial centers. They have advantages for a variety of situations, especially for locations that are distant from or isolated from centralized sewer systems.

For more on operating decentralized wastewater systems, visit our documents database and search by the category Decentralized WW Systems and document type Manuals/Handbooks.